Question

The curved surface area of a cylinder is $2200$ sq. cm and circumference of its base is $220$ cm. Then the height of the cylinder is :

• A. $22$
• B. $10$
• C. $25$
• D. $2.2$

Answer 1

Answer: (B)

$10$

Let the radius of the base be ${}^{\prime }{r}^{\prime }$ cm & height be ${}^{\prime }{h}^{\prime }$ cm.

Now, curved surface area of cylinder $=2\pi rh$

Also, circumference of base, $C=2\pi r=220cm$

$\therefore$ Curved surface area of cylinder $=220\times h$

$\Rightarrow 2200=220\times h$

$\Rightarrow h=\frac{2200}{220}=10cm$